Artificial Analysis Releases Coding Agent Index v2.1

1 reports archived1 independent sourcesupdated 11/14/2026, 08:04:35

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Artificial Analysis released Coding Agent Index v2.1, upgrading FrontierCode to 2.0 and Terminal-Bench to 4.1 with stronger verifiers to resist reward hacking. Claude Fable 5.2 and Claude Opus 5.5 tie for the lead at 58, while cost per task among configurations scoring 48+ varies roughly 30x, from $1.51 to $44.22.

LATEST/Artificial Analysis released Coding Agent Index v2.1, upgrading FrontierCode to 2.0 and Terminal-Bench to 4.1 with stronger verifiers to resist reward hacking. Claude Fable 5.2 and Claude Opus 5.5 tie for the lead at 58, while cost per task among configurations scoring 48+ varies roughly 30x, from $1.51 to $44.22.

Hourly heat curve

11 fully observed hours

Now

22.5

Peak

28.710:00

24h change

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The line compares only sources observed throughout; gap hours are interpolated to keep the trend continuous.

Coverage timeline

Total 1 reports · Latest first

Artificial Analysis (@ArtificialAnlys)T1Nov 14, 08:04·72 pts
Artificial Analysis Releases Coding Agent Index v2.1
- FrontierCode 2.0 adds 132 real-world coding tasks graded on whether a maintainer would merge the change
- Terminal-Bench 4.1 keeps the same 66 tasks but updates verifiers for reliability and reward-hacking resistance
- Claude Fable 5.2 and Claude Opus 5.5 tie at 58, with roughly 30x cost spread among configurations scoring 48+
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